You realize you are getting dragged away by to hot bimbos. Not one to turn down such babes, you follow along without protest.
They tell you that they had always wanted to do a threesome together and have decided that it's now or never since since the shift is about to strip them of their "totally hot juicy bods" their words. You just so happen to be the lucky bastard they grabbed off the streets.
They clearly aren't very bright and haven't read about merging but you let them drag you back to their appartement for the best sex of your life. You lying on your back, one girl ridding your cock, the other straddling your face while you eat her pussy.
Suddenly you can't see or hear anything, the shift has started to merge your bodies together and your head is now deep in some woman's pussy.